Metal Fabrication support programme in next 100 days – Patel
Within the next 100 days, the Department of Trade, Industry and Competition intends launching a support programme for new plant and equipment in metal fabrication. “We’ll meet investors and stakeholders on the long-term development of foundries and still mini-mills, including measures to enable the local beneficiation of scrap metal,” Trade and Industry Minister Ebrahim Patel told Parliament during this week’s debate on President Cyril Ramaphosa’s State of the Nation Address.South Africa exports significant quantities of scrap metal, a major feedstock for foundries, steel mini-mills and even some large steel mills, with some scrap dealers appealing the department’s directive that is be offered to local producers in the first instance, but the Constitutional Court rejecting an application for leave to appeal.
Stainless steel straw could see end of single use plastics
As the backlash against plastic continues, the drinking straw is in drastic need of a redesign. Does a collapsible version made from stainless steel hold the answer?Every day, billions of plastic drinking straws are discarded across the world. In the US alone, it’s estimated that upwards of 170 million drinking straws are used and thrown away daily. Over the past year, however, a public backlash against single-use plastic has started to gain global momentum, and it seems that the era of the plastic straw will soon be behind us. So, what will replace it?
A newly-developed steel grade is improving the integrity of pipelines and reducing the environmental impact of Russia’s oilfields.
Oil extraction in Russia presents a particularly tricky environment for engineers. Pipes are constantly exposed to corrosion by a mixture of oil and concentrated salt, meaning that operation periods are cut short and accidents become increasingly likely. These can be particularly problematic, with surrounding areas becoming subject to dangerous levels of pollution in the result of leaks.Repairs are not easy either. Oilfields are often remote, and conditions can be hostile. The wilds of Siberia have weather conditions that contribute to the pipes requiring constant maintenance while simultaneously complicating the delivery and installation of replacement sections.Thankfully a new, innovative technology from Russia’s National University of Science and Technology (NUST) looks to change the way such pipes are manufactured – increasing efficiency for companies and reducing not only operating costs and necessary repair but also rick to the environment.
TU GRAZ Researchers modify 316L Stainless steel powder to improve quality of metal 3D printing
Researchers at Graz University of Technology, Austria, have modified 316L stainless steel powder for additive manufacturing for better print quality and surface finish. The pioneering aspect of the study was the addition of silicon nitride to control the reaction of borides, which were used as activators in the sintering process. Using this method, the researchers were able to minimise the need for support structures and product parts with better surface finish.
R+W stainless steel mesh inserts help in high-temp environments
Precision elastomer insert couplings offer technical advantages in a wide variety of power transmission applications. With the rigid jaw hubs machined from solid round bar stock, the torque density can be superior to that of almost any other type of backlash free flexible coupling, depending on the stiffness of the elastomer insert which is used.
Most often, precision elastomer inserts are made from injection moulded polyurethane, available in a variety of Shore hardness values, depending on the application requirements for vibration damping, flexibility and torsional stiffness. Softer materials, which are generally more suitable for damping and flexibility, also tend to be less thermally stable, meaning that as temperatures increase, they soften, reducing the torque capacity of the coupling. This has historically left equipment designers to make compromises around high heat, either significantly upsizing the elastomer coupling, or changing to torsionally rigid metallic couplings, which are suitable for a subset of dynamic drive applications but lack the ability to absorb vibration and shock.
To address this problem and more, the R+T coupling development team is now able to offer elastic coupling inserts from stainless steel mesh – mostly eliminating the temperature factors needed when sizing precision elastomer couplings, facilitating compact solutions even in the presence of high heat.